The Warezov variant worm has returned once more to dominate the malware charts, according to managed security company Network Box. During April, the companys security responses blocked more than four million viruses, worms and Trojans daily, with two Warezov variants accounting for more than 30 per cent of all worms.

Beijing was the main source of spam for the seventh straight month, which would go some way to support a recent claim by Eugene Kaspersky that 70 per cent of malware writers are from China. The city was responsible for nearly 11 per cent of spam, nearly 400,000, growing slightly from March. Moscow, Russia (3.47 per cent) was second in the spam chart and Seoul, South Korea (3.19 per cent) third.

Top Sources of Spam

1. Beijing, China - 11 per cent
   
2. Moscow, Russia - 3.5 per cent
   
3. Korea, South Korea - 3.2 per cent
   
4. Warsaw, Poland - 3.0 per cent
   
5. Istanbul, Turkey - 1.9 per cent

Top Sources of Viruses

1. Kuala Lumpur, Malaysia - 6.1 per cent
   
2. Seoul, South Korea - 6.0 per cent
   
3. Madrid, Spain - 5.9 per cent
   
4. Rome, Italy - 5.1 per cent
   
5. Barcelona, Spain - 3.1 per cent

Top Worms

1. Warezov.nf - 28 per cent
   
2. Mytob.dam - 15 per cent
   
3. NetSky.q - 9.5 per cent
   
4. LovGate.ad - 9.0 per cent
   
5. Nyxem.e - 8.6 per cent
   
6. Doombot.d - 3.9 per cent
   
7. Warezov.do - 3.3 per cent
   
8. Worm.VB-9 - 2.4 per cent
   
9. NetSky.t - 2.3 per cent
   
10. Bagle.gt - 2.3 per cent

Top Trojans

1. Small.coc - 59 per cent
   
2. Nurech.bi - 14 per cent
   
3. Small.cnd - 11 per cent
   
4. SdBot.xd - 8.0 per cent
   
5. Nurech.bh - 3.1 per cent
   
6. Agent.bp - 0.95 per cent
   
7. VB.axd - 0.59 per cent
   
8. Small.coh - 0.58 per cent
   
9. Nurech.bd - 0.58 per cent
   
10. PassAlert.i - 0.35 per cent

Related links: (Open in a new window.)
www.network-box.co.uk/
www.network-box.com/

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